adds basic math operators, thanks to kasper associative and prioritised

2014-05-10 21:41:46 +03:00
parent 6378209f33
commit 2d389d2e00
7 changed files with 108 additions and 5 deletions
--- a/lib/parser/expression.rb
+++ b/lib/parser/expression.rb
@@ -14,5 +14,9 @@ module Parser
    rule(:expressions_else)   { delimited_expressions(keyword_else) }
    rule(:expressions_end)    { delimited_expressions(keyword_end) }

+    rule(:operator_expression) do
+       infix_expression(expression,  [multiply, 2, :left],  [plus, 1, :right]) 
+     end
+
  end
 end